gentoo – enable initramfs


# emerge genkernel
then mount the boot volume
# genkernel --install initramfs
edit the grub.conf:
> title Gentoo Linux 3.10.7-gentoo
> root (hd0,0)
> kernel /boot/kernel-3.10.7-gentoo root=/dev/sda3 rootfstype=ext3
> initrd /boot/initramfs-genkernel-x86_64-3.10.7-gentoo

do not forget to create a new initramfs in case of building new kernels